Hand torch and igniter for use with low boiling point fuel



Jan. 19, 1954 R. E. PETERSON 2,666,480

HAND TORCH AND IGNITER FOR USE WITH LOW BOILING POINT FUEL 2Sheets-Sheet 1 Filed Feb. 24, 1947 N U f m m. T W. v d w A lay Aw 4 wwan m m IZNQ Q Q Q w Nu ww Mm W lllzl ,4 rme/vEs s 1954 R. E. PETERSONHAND TORCH AND IGNITER FOR USE WITH LOW BOILING POINT FUEL 2Sheets-Sheet 2 Filed Feb. 24, 1947 A rwe/ya s Patented Jan. 19, 1954HAND TORCH AND IGNITER FOR USE WITH LOW BOILING POINT FUEL Robert E.Peterson, New York, N. Y.,assignor to Repeter Products, 1110., LongIsland City, N. Y., a corporation of New York Application February 24,1947, Serial No. 730,488

3Claims.

This invention relates to torches, and mor particularly to a portableblow torch, characterized by a self-contained igniting device andadapted to burn in gaseous form a low boiling liquid fuel.

Portable blow torches of the type commonly and frequently used byplumbers, electricians, mechanics and the like are, for the most part,the well-known pressure type which burn gasoline or kerosene. Suchtorches, while satisfactory for heating soldering irons, or meltingfusible materials in readily accessible locations, are nevertheless ofrelatively limited application. 'As it is unsafe for a workman to carryany type of torch while it is ignited, this common type of blow torch ischaracterized by very material difculties in use, by reason of the timeand difficulty encountered in initially igniting or .reigniting it. Asis well known, such a torch must be primed or preheated before it willburn vigorously and at the high temperatures necessary. Thus, forexample, if a painter finds it necessary to mount a ladder to get at thepaint he wishes to burn, he cannot safely carry the ignited torch up theladder with him, but must attend to the ignition of the torch whilesometimes precariously bal-z anced on a ladder top. Then too, suchtorches periodically require pumping to restore the pressure in the fueltank, with the result that pressure failure, with resultant lessening ofthe flame and lowering of its temperature, may occur, and indeedfrequently does occur at a critical time.

Then too, such gasoline blow torches areusually relatively heavy andcumbersome, must be frequently cleaned, are troublesome to refill, andoccasion the waste of a substantial amount'of time and fuel for bothinitial ignition and reignition. Also, such torches, because of inherentincapacities, cannot provide a flame of sufficient heat intensity andshape for certain types of jobs. 1

It is accordingly among the objects of my invention to provide a simple,relatively inexpensive and light weight but rugged blow torch, whichovercomes the above disadvantages, in addition to others, in a simpleand practical manner. Other objects will be in part apparent, and inpart pointed out hereinafter.

In accordance with one form of my invention, I provide a light-weightcontainer for a low boil- 2 automatic ignition apparatus which ignitesthe air-fuel mixture automatically when the valve mechanism is opened topermit the passage of gaseous fuel from the fuel tank to the mixingchamber. More particularly, the valve mechanism may, in accordance withmy herein disclosed invention, comprise a flexible tube formed ofnon-corrosive material which, when the torch is out of use, isautomatically pinched closed,

thus to shut off the flow of gas, but which, by reason of its resilienceand the gas pressure, readily opens to permit the flow of gas when thetorch trigger is depressed.

In the drawing, wherein I have shown several forms of my invention,

Figure 1 is a sectional elevation of one form of my torch detachablysecured to a fragmentary portion of a fuel container;

Figure 2 is a sectional elevation of another form of the torch; 1

Figure 2a is a fragmentary sectional elevation taken along the line 2a2aof Figure 2.

ing liquid fuel, which may be detachably secured to a pistol-like torch,provided with manually controllable valve mechanism and adjustable meansfor providing variable amounts of primary air for adjusting the air fuelratio to its most efficient value.

Also included in the torch is an Figure 3 is a fragmentary top planportion of the igniting device.

Referring first to Figure 1, the torch, which is generally'indicated atIt, comprises a preferably two-piece body casting H or the like, havinga neck l2 for detachable connection to a container [3, a hand grip [4, atrigger I5, a metering valve, generally indicated at [6, a mixingchamber Ill, and an ignition device generally indicated at I8. Thus,when the trigger I5 is depressed, the valve mechanism to be describedhereinafter is opened to permit the fiow of inflammable gas fromcontainer i3 to mixing chamber ll, wherein the gas is mixed with primaryair, and from which the mixture flows for ignition by the device 13.

Container I3 is of a type adapted to contain a low boiling pointliquified gas, such as propane or butane, or a mixture of the two, andshould accordingly be sufficiently sturdy to withstand the pressure ofvaporization of such fuel or fuel mixture. To the top of the containeris swaged or otherwise secured an exteriorly threaded neck t9 having anannular rabbet formed in the upper end thereof to receive a flangedbushing 20. This bushing, in turn, has secured therewithin a flexibleseal or stopper 2! which, for example, may be formed of neoprene or anyother suitable material which is not affected, or rather which is notsubject to attack by the liquid fuel in the ting and the top of the borewithin the body H casting. Also threaded into the. tp=0f the pistol bodyneck [2 is a gland 28, sealed as byvapacka ing ring 29, and havingsecured therewithin a metal tube 30, which communicates byway of bore 26with the interior of containerI-S.

Pistol body II is hollow, so as to provide "a" chamber 3| within whichthe top of gland: 28 and tube 30 are disposed. Within this chamber isdisposed a bracket 32, which is preferablyformed of a phenoliccondensation compound, or other suitable dielectric material, and which:may: be

secured' to the side or" the pistol casingin any suitable manner, as,for example, by screws 33. Bra'ck'et SZ is suitably drilled to receiveafiexible tube "34, the lower end of which is attached'sto the uppereridof tube 32, and 'the'upperend 34a efwhich is attached to "theright-hand end of a tube 35. "rupees is also' form-ed-oi aflexiblematerial, e.'- g. neoprene, or other material not subject-to attack'bythe gas flowing therethrough. =The hole extending-through bracket 32is'just large enough to receive tube34 and adequately support it againstmovement withinchamber' fl.

Tube 35'which; as noted-above, is connected to the upper end of tube 34,is preferably of metal, andextends through a wall 36' of the pistolcasing, and into'a 'jet 3'I which isscrewed into this wall. The orifice33 of jet 31 opens into mixing chamber H.

The flow of gas through tube 34'' is controlled by'both trigger l andvalve 16, as will now be described. "Trigger I 5inc11ides' a body'portion -39,-'-a-'downwardly extending finger engageable portion 4a, anda pilot 4| received respectively "within a-guide 42,- a recess 43, andanother guide 44* formed in pistol casting H. A spring"45 is "disposedwithin the pistol "casting and has one end seated-against an innerportion of grip 14,

and the other end bearing against the right-hand *side of triggerbody39, so as constantly to bias "trigger-1'5 to the left, .i.-e. toclosed position. Attached to one side of trigger body 39, as by pins-46;is a plunger 41, the free end 41a of which extends'into a hole 32aformed-in-bracket 32,.and

"communicating with the vertical hole therein within which the centersection of tube 34 is disposed. This end 4711. of plunger 47 is adaptedto bear-against tube 34 with sufiicient pressure, :by virtue of spring45, as to pinch tube 34 hard :enough to tightly close the passagetherethrough,

even against the substantial'pressure' of the'gas gincontainer 13,. Thusit maybe seen' that when it isdesired touse the torch,'trigger i5 ispressed "into pistol handle I4, i. e; is-moved to the right,

as viewed in- Figure 1, thus to relieve thepressure of-"plunger end 41aon tube 34, permitting the tubetoopen and gas to flow therethrough.

To'meter the flow of gas through tube 34, valve 16' is provided. Thisvalve comprises a thumb piece 48, secured to the end of a shaft 49,threadably received within a hole 56 in the upper portion of casting II,and having secured to its end a stem-'5! having a rounded end 52extending into a ho1e53'iormed in theupper portion of bracket 32. Thishole communicates with the hole with- "in which tube is disposed-so thatwhen thumb 4 piece 48 is rotated in one direction, stem end 52 can beforced against tube 34 to pinch the tube as much as desired. Thus theflow of gas through the tube can be metered, as desired, or when it isdesired to store the torch between periods of :use,;tube 34 may-becompletely closed by valve it, "thus providing an adequate factor ofsafety over and above the closing action of plunger 4?.

Mixing chamber I1 is formed by a fitting 54 m ofheatrinsulatingmaterial, which may be thread- ;Jably attached to the boss 55 of thepistol casting II, which carries jet 31. Fitting 54 is tapered r asat-54wandis'provided with one or more open- "in'gs* 56,",and hasrotatably mounted therein a sleeve 51; similarly-provided with holes 58.Thus t-sleevezisl may be rotated relative to fitting 54 to bring intocomplete or partial registery holes 58 and "56, respectively, to providethe desired amount of primary air' for mixture with the gasetoztheid'esired' a-ir'fuelrationwithinmixingchambe]: 51. Itfollowsthatjet 3.1;fitting lilii'andsleeve i""l.-;comprise;' in 'efiect;a 'venturi. The free endiof 'rfitting 5'4:detachablyreceives a nozzle:or burning chamber, generally indicated at 59, havingi-ho'les 1 foradmission:;of=sec.ondary air. Nozzletiis supports the'ignitiontdevice|8,as shown. 'iIf de- .sired,ynozzle"59 maybeprovided with one or morefins 6|,- :for the dissipation of'heat, and'also may carry an end :cap$2 or :the like, of greater diam- Keter' than the nozzle end, for:regulation of the ishapeof the ifiame, and-.alsofor drawing insup-:plementary air'to assist the-cor'nbustion of the'air- 'fuelmixture.

The structural aspects. of thentorch. hereinbeforedescribedare' such'asreadily lend themselves to fabrication from: light-weight: mate-.lllflilSj'SO that:.the'wfeight of :the torch and-tank together ismaterially less than that of the conrventional. blow torch, thus-greatlyfacilitating the tusestof-ithe torch; and. -indeed.making-.-use there-Joli-P05511016 under. conditions which would 'preclude'theuse ofagasoline-blow torchof the well- :known type. Thus, shown, thembody ofthe rtorch vmay comprise a single casting whichmay 'beclosed "on oneside and open'on the other-to rzpi'ovide=aaccessrto' the interior 'o'fthe torch :for the-installation therein of the parts heretofore andhereinafter described, the. opengside conveniently beingclosed by acover, plate (not e'shown) a It should also be noted that the nozzle-59".:is releasably mounted on the. end oifitting w54,-where lit isZheld'in proper operative position rby'a spring clipfit; fastened asby'a rivet 64 to :ithe pistolcasting. Thus it may be seen that differentnozzle sizes a and shapes 'may' readily be provided, :thereby to.control within limits the size and shape of the .flame.

As':noted :hereinberore, thev fuel. for the torch :.:may' -be fliilDW-Iboilingxpoint fuel which, because of its high vapor pressure, maintainsitself inliqauid formwithinithe container 43. lhave found itadvantageous to employ pure 'pI'Opa-Yle liquid :form, *although anyother uliquid. fuel-having proper-ties :similarzto those ofvpropane maybe 65 .used. .Thusany fuel having a boiling pointof the'nrder'aof -40?.may-be used, as such low boiling point fuels create satisfactorypressures which do znotbecome-dangerously high in temperatures of 0:F;'to l30F. For example, pro 79fpaneboils at-14l.5'F. andat 0 F. has avapor pressure of3f7.8 pounds per square inch, and at 130 FLhas a vaporpressure of 274.5 pounds per 1 square:..inch. It'will be appre'ciatedpofcourse, that this; higher pressure doesin'ot have any occupationalhazards attendant thereto; as modern steel containers are designed towithstand such pressures with a factor of safety in excess of five.Also, from the foregoing description of container l3, it will be readilyapparent that it an easy matter for the user of the torch to carry withhim one or more extra ,fuel containers which may be readily attached tothe torch when the fuel supply in the container in use becomesexhausted. Also, by reason of the nature of the seal or stopper 2|, thecontainer in use may, if desired, be disconnected from the torch withoutdanger of escape of gaseous fuel therefrom, as the spring clip or ring23 tightly closes the neck 'of the stopper when the needle 25,15withdrawn.-

As hereinbefore noted, ignition of conventional gasoline blow torcheshas certain disadvantages, To the end of overcoming these disadvantages,I have provided the ignition system .now to be described. The igniter I8may comprise a flanged bushing 65, having secured therewithin adielectric 56, the bushing being thread= able into nozzle 59 orfrictionally held therein,

as desired. The dielectric plug 86 carries a conductor pin 61, to whichis attached one end of a resistance element or coiled wire 58, the otherend of which is grounded, as to the bushing 65.

'To pin 6'! is fastened one end of a conductor 63,

the other end of which is attached to a binding post 10, mounted onbracket 32. Electrically connected to this binding post is a resilientspring is :pistol casting and is carried down through the handle l4thereof, where it is connected to a fixture which supports a contact Tl.This contact 11 is adapted to be engaged by a contact 18 of a dry cell19 which is conveniently removably disposed within the bottom of torchhandle 14, the other side of the battery being grounded in' customarymanner. Thus it follows that when switch contact 52 engages switch arm13, a

circuit to the resistance element 58 is completed,

causing the element or wire to glow with sufficient heat to ignite thegaseous mixture flowing through the nozzle.

Energization of the heater element, es which,

incidentally, may advantageously be a platinum wire of proper diameter,is automatically effected upon depression of trigger l5. To this end,trigger body 39 has pivotally fastened thereto one transverse end 88 ofa U-shaped link which is biased counterclockwise by a link 85 which isbiased counterclockwise by a link 82. This U- shaped link 8! togetherwith its other transverse end 83, extends from trigger body 39 into alon gitudinal groove 84 molded in bracket 32 in such manner that thelink end 83 rides along the bottom 85 of the groove, being heldthereagainst by spring 82. When trigger I5 is in the position shown,wherein tube as is pinched closed, link end 83 lies to the left of apawl 88, pivotally mounted on bracket 32, and spring-biasedcounterclockwise. It may now be seen that when trigger l5 is depressedto permit gas to flow through tube 35, link end 83 rides up pawl 85 andultimately engages the resilient switch arm 1!, forcing this armupwardly to engage its contact 12 with the other switch arm 13, thus toclose the circuit to heater element 68. It should be 'noted, however,that before this circuit is closed,

tube 34 is released so that gas may flow therethrough, thus to assurethe presence of a gaseous mixture in the vicinity of the heater elementwhen the circuit thereto is closed. As the trigger i5 is furtherdepressed, link end 33 finally rides over the top of pawl 86, and thelink spring 82 swings the link and accordingly the end 83 downwardlyagainst the bottom 85 of groove 84, so that the switch contact 12 canmove away from switch arm 13 and break the circuit to the heaterelement. It follows, of course, that when trigger it is released, linkend 83 underrides pawl 35, swinging it clockwise as it rides thereunderto its position shown. Thus the heater element E8 is energized for abrief period of time only, sufiicient, however, to ignite the gaseousmixture within the nozzle.

While a liquified gas such as I have hereinbefore described is usuallyfree of foreign particles, I have nevertheless found it desirable toprovide one or more filters between the gas container and the torch jetto preclude clogging of any of the gas passages within the torch,particularly in vi w of the fact that these passages are of smalldiameter of the order of .013 of an inch. Thus I have provided a filterwafer 87, which may be formed of a suitable ceramic material, and isinterposed between fitting 24 and gland 28 at the entrance to the gaspassageway within the torch. At the exit end of the gas passageway, Iprovide another filter wafer 38 which may be conveniently disposedwithin wall 36 of the casting at the base of the bore, which receivesthe nipple end of jet 37. Thus it may be seen that any foreign particleswhich might be forced from container l3 into the torch are stopped byfilter 81, filter 88 precluding the passage of any foreign particle thatmight pass filter 8? into the minute orifice 38 of'jet 31.

Referring now to Figure 2, wherein I have shown another form of myinvention, the torch is generally indicated at Hit, and, as in the caseof torch I i includes a body casting lili having a neck 02 by which thetorch is detachably fastened, as by a bayonet joint, generally indicatedat 103, to container I 3. Torch Hill also includes a handle or grip ltd,within which is slidably mounted atrigger me. A metering valve, generally indicated at I96, is disposed in the top of the torch casing tometer the flow of gas into a mixing chamber W1, wherein the gas is mixedwith air, and from which the mixture flows for ignition by an ignitingdevice, generally indicated at I08.

In the present instance, container 13 has brazed, or otherwise securedto the top thereof, a neck H39 in which are mounted pins l H) formme oneelement of the bayonet joint Hi3. Neck Hi9 also has disposed therein astopper or seal l H which is tightly secured in place by a flangedbushing H2 press-fitted into the top of neck N19.

The entrant end of the neck is frusto-conical, as

needle M being generally similar to fitting 24 and need1e 25 ofFigure 1. Thus when container I 3 is attached to the torch casing, thefitting needle l 14 enters the aforementionedhole in seal III, spreadingthe .hole' sufiiciently, andaccordneedle and the seal. As needle H4isprovided with an axial hole II5, communication is established with theinterior of container I3.

The top'of fitting I I3 is sealed relative to the casing IOI, preferablyby a sealing ring H5,

which conveniently forms a space-within which .is disposed a filter IIl,between fitting I l3 and a small, transversechannel I18, formed incasing IOI. This channel communicates with cne'end of a small pipe M9,.the other end of which is secured to a resilient tube- I20, the dottedline portions of the pipe and tube being disposed within a chamber (notshown) formed within casing Il. Tube I is threaded through a hole curedto a small pipe I22, which is mounted in and extends through a .hole inthe casing and communicates with arr-opening 123 formed there- .in. Thisopening is threaded, as shown, to receive the nipple end of a jet I24, afilter I23abeing disposed between the'inner end of the-jet and thebottom of the hole I23. Thus it may now be vit is depressed. Thetriggeris constantly biased to the left of the drawingas by a spring,I28, one end of which bears against the torch handle I04 within a recessI20 formed therein, andv the other end of which bears against theright-hand end of trigger'portion I25. Trigger portion I also carries atransversely extending -pinwhich acts in the manner'of plunger 4'!(Figure 1) to pinch tube I20 closed when the trigger Metering is in theposition shownin Figure 2. valve I05 includes a stem .I3I which maybeaxially: adjusted, as" desired, with respect to tube I20, to control theside of the opening therein in the same manner, and for the same-purposeas hereinbefore described with respect totube 34 and valve stem 5|(Figure. l). Thusit follows that tube I20 may be held open or closed atwill by'manipulation of trigger I05, and the flowof :gas through thetube maybe metered or controlled as desired by, manipulationofrmeter-ing valve I05.

It. might be well to .note at this point thatcasing I 0!. comprises apair of castings I Ola and I Illib (Figure 2a) which are so formed that,when secured together, they .form the chambers hereinbefore referred.to, as well as a channel in which. tube 120 is disposed, thus adequatelyto support the tube against the pressure of pin I30 when trigger I05 isreleased, to pinch off the tube. Also, casting IOIb is so formed as toreceive a filler .l0Ic, the inner. vertical surface of which comprisesaguide or supporting surface for trigger portion 125.

,The. ignition systemf for...the. torch. .shownl..in Figure '2 is ofsthehot spark type, wherein a. sucin the casing; with its upper end 9200,being-disposed within a chamber i2I formed in the upper portion of thecasing. This end of the tube is socession, of sparks is rapidlygenerated .upondepression ofv trigger I05 by a. condenser inductorsystem. Thus the handle I04 of the torch-is hollowed to receivea drycell I32 which comprises the power source for a circuitincluding leadsI33 and I34, a condenser 35, an inductor 136, a switch generallyindicated at I51, aspark plug or the like, generally indicated at I38,lo-

cated in the end of nozzle. 59 and spring clip 53. .This spark plug orspark gap I33 is connectedas by a beryllium resilient conductor I39 tothe inductor 536 sothat when the contactsof switch I31 are closed, in amanner that will be described, a spark is created to ignite thecombustible air and gas mixture flowing through nozzle 59.

Switch I3! is successively and rapidly closed to cause .theproduction ofa rapid succession of sparks by plug I38 by the mechanism now to bedescribed. Trigger slide portion I25 has secured thereto a pin I40 whichforms an anchor for one end of a spring MI, the other end of which isfastened to a pin I42 secured to and projecting from a rack 143. Thisrack includes a shoulder I44 which normally rests against the. end of apawl =I45 which is spring-biased into its holding position by a leafspring I46. The underside of pawl I45 is provided with a cam surfaceIii! adapted to cooperate with a rise I48 formed in the left-hand end oftrigger slide I25. It may now be seen that when trigger I05 isdepressed,i. e. is drawn into handle I04, slide I25 ismoved to the right, asviewed in. Figure 2, against the pressure of spring I28. This, ofcourse, tensions spring I4I, but does not move rack I43, inasmuch as therack is held stationary by pawl I45. However, when carn I41 of pawl I45is engaged by risev 1480f trigger slide I25, pawl M5 is swung clockwiseagainst spring M6 so that as trigger slide I25 continues to move to theright, thepawl is swung clear of shoulder I44 on rack "E43. When thisoccurs, the rack is suddenly and rapidly jerked to the right. Thisabrupt and rapid movement of rack I43 rapidly closes and opens switchI31 to efiect the repeated generation of sparks in the following manner.

Rack l lssmeshes with pinion I49 which is secured to a pin I50 (seeFigure 3) rotatably .mounted in the torch housing. Keyed to this pin I50is a clutch element I5I which rotates with the pin but isslidableaxially thereof, this element I5! being constantly biased into.engagement with complementary clutch formations in a ratchet wheel I52by a leaf spring l53.

This ratchet wheel is positioned to ratchet over and accordinglyintermittently engage and depressa lug I54 carried by the outer end ofthe movable arm I3'Ia, of. switchv I31, thus to force this armintermittentlyinto engagement with the otherv arm i3lb of the switch, toclose. the switch. It accordingly follows that when rack I43 is abruptlyjerked to the right, as hereinbefore described, pinion I 45, andaccordingly pin I50, are rapidly rotated, and through theinterengagement of the clutch elements described, the teeth on ratchet.I52 are rapidly moved in a clockwise direction, as viewed in Figure 2,alternately to close and open switch I31 and accordingly effect theproduction of the succession of sparks referred to. Thus, reliance isnot placed on the production of but a single spark to ignite thecombustible gas mixture flowing through nozzle 59.

QWhen trigger I05. isreleased rack 153, of course, moves, to the leftand consequently r0- 9 tates pinion I49 counterclockwise. This. however,does not effect counterclockwise rotation of ratchet I52, as clutchelement ll merely overrides its complementary element carried in or onratchet I52, thus precluding the production of sparks in plug 138 uponrelease ofthe torch trigger. To preclude any possibility of theproduction of sparks at this time, ratchet wheel I52 and lug I54 are soformed that the lug precludes counterclockwise rotation of the ratchet.

It may now be seen that in my improved torch, structural simplicity andoperating efliciency are judiciously combined in a manner that attainsthe several objects hereinbefore set forth in a thoroughly practicalmanner.

As many possible embodiments may be made of the above invention and asmany changes might be made in the embodiment above set forth withoutdeparting from the scope thereof, it being understood that all matterhereinbefore set forth or shown in the accompanying drawings is to beinterpreted as illustrative only and not in a limiting sense.

I claim:

1. In apparatus of the character described for burning a low boilingpoint fuel, the combination of, a container adapted to receive and holda low boiling liquefied fuel which is maintained in liquid form in saidcontainer by reason of its own vapor pressure, a body member having fuelinlet and outlet openings the former of which is connected to saidcontainer, said container being outside of said body member, meansforming a fuel passageway within said body member between said openings,a spring-biased member 'engageable with said fuel passageway meansnormally closing said passageway to block the fiow of fuel therethrough,said body member including a hand grip, a manually operable membercarried by the hand grip and associated with said body member and withsaid spring-biased member and operable to move said spring-biased memberto open said fuel passageway so that fuel can flow therethrough, acarbureting device in communication with said outlet opening, meansforming an air supply communicating with said carbureting device, meansforming a mixing chamber on the discharge side of said carburetingdevice, means forming a burner chamber communicating with said mixingchamber, an igniting mechanism including an igniting member operativelyassociated with said burner chamber whereby the air-fuel mixture withinthe burner chamber may be ignited. and means ineluding a transmissionsystem extending from said manually operable member to said ignitingmechanism for actuating said mechanism, whereby when said manuallyoperable member is operated said spring biased member is moved out ofoperative position with respect to said fuel passageway means to permitthe latter to open and said igniting member is operated to ignite theair-fuel mixture, further movement of the said manually operable memberinterrupting the operation of the said igniting memher.

2. Apparatus according to claim 1, wherein said transmission systemincludes a delay device operatively associated with said manuallyoperable member and said igniting member whereby when said manuallyoperable member is operated said passageway is first opened andthereafter said igniting member is operated to ignite the air-fuelmixture, further operation of the manually'operable member interruptingthe operation of the igniting member.

3. Apparatus according to claim 1, wherein said igniting mechanismincludes an electrically energizable member, a switch and a battery,said energizable member being disposed in said burner chamber, saidswitch being disposed in said body member, and said battery beingdisposed in said hand grip.

ROBERT E. PETERSON.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 899,181 McIntyre Sept. 22, 1908 1,364,972 Andersone et al.Jan. 11, 1921 1,463,518 Thomas July 31, 1923 1,530,914 Roden Mar. 24,1925 1,617,399 Kress Feb. 15, 1927 1,814,068 White et al. Jan. 14, 19311,822,356 McCartney Sept. 8, 1931 1,879,631 Mott Sept. 27, 19321,895,032 Fisher Jan. 24, 1933 1,970,237 Kramer Aug. 14, 1934 2,064,535Greenfield et a1. Dec. 15, 1936 2,482,794 Peterson Sept. 27, 1949FOREIGN PATENTS Number Country Date 524,969 France May 25, 1921 41,439Denmark Dec. 28, 1929

